The diary is from an area soldier. The author's family found it buried in a trunk and donated it to the library.
It describes what day-to-day life was like in the mid-1860's. Experts say it will help them learn even more about one of the biggest events in U.S. history.
A family member transcribed the whole thing before donating it. He says the writing is so tiny, he had to use a jeweler's magnifying glass to see the words.
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